Help, eberspacher not working on 12 volt

Discussion in 'Motorhome Chat' started by meakwooders, Mar 20, 2016.

  1. meakwooders

    meakwooders Funster

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    Hi, I am testing out my new to me Murvi Morello. The heating works fine when hooked up, but when I switch it on, on batteries it won't kick in. And then it switches off the control panel. After 2 attempts I get a message to charge batteries. I don't think they are flat though.
     
  2. Tea Bag

    Tea Bag Funster

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    Hi.
    They do need some power,just an idea..Have you tried to start it working with the engine running,you will have a bit more power to draw from.
    JUST an idea.. Also,they do need servicing/using regularly,to keep them on song,so perhaps.
    Tea Bag
     
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  3. andy63

    andy63 Funster

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    It does sound like your batteries are low...
    The only way is to check the voltage when the heater is going through its start up... ie under load with no charging source...
    My hydronic heater has a cut off at 10.2V and will eventually lock out after so many attempts... Can't remember how many it is
    Ta andy
     
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  4. Snowbird

    Snowbird Funster Life Member

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    Agree with teabag. Try starting it with the engine running as they do draw a lot of power on startup. Also check wire contacts are clean and good. If it starts OK on hookup then it's either flat batteries or voltage loss.
     
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  5. John Laidler

    John Laidler Funster

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    Is there no meter giving the leisure battery voltage?
     
  6. meakwooders

    meakwooders Funster

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    Hi DBK, that was the odd thing. The meter shows the leisure battery voltage at about 11.2, and then it drops to 10.2 and nothing works for a bit but then the battery voltage improves, and lights work again.

    Update - I tried it again, after running it on hook up for ages, and it fired up first time on 12 volt. so i think it may have been that it hasnt been used for a while, or the batteries werent fully charged.

    Thanks for the tip about using the engine for more power on start up Teabag and Snowbird. I will try that next time I have an issue.

    I only have one leisure battery, and I dont know how old it is, or whether it needs to be replaced. Chester will be the test next weekend.
     
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  7. meakwooders

    meakwooders Funster

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    Oh, and I need a new kitchen tap, this one came off in my hand! Clearly, I am stronger than I thought! Still, one advantage of a compact and bijou van, it is no effort to fill up the kettle from the bathroom one, and transfer to the bigger kitchen sink for washing up.
     
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  8. John Laidler

    John Laidler Funster

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    Your voltages are way too low. It shouldn't really drop below about 12.2 and ideally be above 12.5

    If it's been down to 10 or so it suggests the batteries might be goosed.
     
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  9. steevie

    steevie Funster

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    Yep, the batteries are the problem. 12.8 when charged, and 12.4 when getting flat. With the engine running, or on hookup, you will have more like13.2v. Ebers and webastos shut down with less than 11v.
     
  10. GWAYGWAY

    GWAYGWAY Funster

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    My leisure voltage is 12.8 volts. The heater on yours has a sensor to stop the heating element glowing but not getting hot enough to fire the fuel and causing an internal fire. Run the engine and see what happens then.. We had a fleet of lorries with these and if the thermostat was set too low they heater was off on off on and in the morning the batteries would not start the lorry. The element use a lot of current like the glowpugs on an older diesel did, basically a short circuit in a tube. If it did fire up with a weak glowplug there would be acrid white smoke pouring out and muck up the whole heater.
     
  11. The Wino

    The Wino Funster

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    As above there is a big draw on the battery on start up.
     
  12. Jaws

    Jaws Funster Life Member

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    Sounds like you need replacement leisure battery to be honest !!
    If the van came from a dealer get them to replace it post haste !!
     
  13. TheCaller

    TheCaller Funster

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    I think I read somewhere that the latest models have changed the system specifically to avoid this issue. Instead of shutting down completely when the cab is up to temperature, they go into a sort of idle mode, rather like a gas pilot light. So overall they use a bit more diesel but a lot less battery power.

    Slightly ironic really, as modern gas heaters have gone in the opposite direction, using battery powered igniters rather than pilot lights. But then propane is much easier to light than diesel!
     
  14. TheCaller

    TheCaller Funster

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    Hi @meakwooders , did you get your heater and/or battery problems sorted?

    If the battery(s) were low, it could just be that they need replacing, or there might be a problem with the charging system, in which case you will soon have the same problems all over again even with new batteries. :(
     
  15. Ranger

    Ranger Funster

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    Our Eberspacher pulls about 9 amps to start it for a few seconds but only uses about 0.5 amp when running slowly so it works best if you can find the sweet spot for it to stay on. The heavy current draw at start up will show up any weaknesses in battery or wiring.
     
  16. meakwooders

    meakwooders Funster

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    Update.

    Well I travelled up to Huddersfield to Wellhouse Leisure. They diagnosed a stuck relay, which prevented one battery charging properly. It seemed to solve the problem, although I did explain what had happened before, the control panel shutting it all down etc.

    So I drove back to Taunton for work and then down to Cornwall for the excellent Murvi meet!

    On the way back, another issue arose. I found that the van lost power when accelerating up hill. A bit hairy trying to join the A30, and also when overtaking a lorry.

    Wellhouse authorised me taking it to a Fiat dealer for diagnostics. The only one with availability within a week was in Weston super Mare! So, a mobile mechanic came out, plugged in the computer,, and reported no codes.

    His assessment is that the EGR valve needs cleaning or replacing, also that I need 4 glow plugs, as it never starts first time. Also the radiator was empty!

    While waiting for the mechanic, outside the B and B, I was chilly so I put the heating on! Five minutes later it shut itself off, saying "charge the batteries". So that issue is not quite as fixed as we thought.


    Wellhouse want to take the van back,so they can investigate the engine fault, and sort out my eberspacher heating ( I wonder if the control panel has a gremlin, or a teenage attitude problem) Millie is 13 years old!

    I am very disappointed, as I had planned to move out of the B and B and back into the van next week. I prefer my own space. Still, I am grateful Wellhouse are taking responsibility for the problem.

    Oh well, I am sure we will get there eventually.

    Thanks for reading. Hope it is interesting for those of you who tried to help.

    Karen
     
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  17. mjltigger

    mjltigger Funster

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    Karen I really think your batteries are goosed. I gave two batteries with 200ah between them and mine will run for 2 days (admittedly webasto not ebers) and still be running when I drive off. I do often start it outside the house before I drive away though so might not be working very hard
     
  18. gus-lopez

    gus-lopez Funster

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    I'd be most concerned about where the radiator water has gone & has it done anything to the engine ?
     
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  19. mowbotman

    mowbotman Funster

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    I have the same problem,fitted 2 new 110 amp batteries , still does it,start engine up,once heaters up and running,turn engine off and will stop and start all day,I think the cable size may need increasing,common fault on Murves so I gather from the last meet , CF parkinson carried out a full service as well around 12 months ago costing £200 , spoken to them about it, and they said they would have it back and try and sort
     
  20. jonandshell

    jonandshell Funster

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    Not many motorhome converters seem capable of wiring anything up properly.
    Diesel heaters cause them the biggest problem.
    They seem to hate having to put in thick enough wiring and the correctly rated connectors to supply the large startup currents without resulting voltage drops.
    9 out of 10 diesel heater faults raised on Motorhome Fun seem to be down to crap wiring and poor batteries.
    Ours runs 100% reliably and has done for years following rewiring of the heater's supply.
    Prior to thaT, it was the same old story of low voltage faults when the batteries were nearly fully charged!
     
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